I think I didn't formulate things the proper way, or maybe I don't understand all the details of your answer because of the language barrier, but I believe we're saying basically the same thing.
After seeing this post, I went to the play store to give my 1 star review.
Then I saw that I already put 1 star back in 2017 stating that the app is crap xD
While I get your excitement and willingness to invite more people here, I don't believe Sync and its team should be responsible for or representative of the potential migration of its users.
Of course, the official Sync Lemmy community should be advertised, but as for the choice of migrating and choosing an instance, Sync shouldn't interfere with that, as that is not its role or its purpose.
Bookstack is absolutely great. I have all my selfhosting knowledge written there from when I started 2 years ago.
It is so great that I've started documenting stuff for other hobbies and for work.
Come on, give it some time.
It's coming a long way, and devs are working their ass off to deliver some quality updates.
Also, there are a dozen apps in the works for iOS and Android that are to be released soon, if that's not already the case. So you should have more choice to pick a better experience browsing lemmy in the coming days.
Not sure how you tried to install it, but I managed to install it with docker a couple years back. Not sure it's still up to date but here's the docker-compose
Neat. Thanks.